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// Verify that coroutine promise and allocated memory are freed up on exception.
// RUN: %clang_cc1 -std=c++1z -fcoroutines-ts -triple=x86_64-unknown-linux-gnu -emit-llvm -o - %s -fexceptions -fcxx-exceptions -disable-llvm-passes | FileCheck %s
namespace std::experimental {
template <typename... T> struct coroutine_traits;
template <class Promise = void> struct coroutine_handle {
coroutine_handle() = default;
static coroutine_handle from_address(void *) { return {}; }
};
template <> struct coroutine_handle<void> {
static coroutine_handle from_address(void *) { return {}; }
coroutine_handle() = default;
template <class PromiseType>
coroutine_handle(coroutine_handle<PromiseType>) {}
};
}
struct suspend_always {
bool await_ready();
void await_suspend(std::experimental::coroutine_handle<>);
void await_resume();
};
template <> struct std::experimental::coroutine_traits<void> {
struct promise_type {
void get_return_object();
suspend_always initial_suspend();
suspend_always final_suspend();
void return_void();
promise_type();
~promise_type();
void unhandled_exception();
};
};
struct Cleanup { ~Cleanup(); };
void may_throw();
// CHECK: define void @_Z1fv(
void f() {
// CHECK: call i8* @_Znwm(i64
// If promise constructor throws, check that we free the memory.
// CHECK: invoke void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_typeC1Ev(
// CHECK-NEXT: to label %{{.+}} unwind label %[[DeallocPad:.+]]
Cleanup cleanup;
may_throw();
// if may_throw throws, check that we destroy the promise and free the memory.
// CHECK: invoke void @_Z9may_throwv(
// CHECK-NEXT: to label %{{.+}} unwind label %[[PromDtorPad:.+]]
// CHECK: [[DeallocPad]]:
// CHECK-NEXT: landingpad
// CHECK-NEXT: cleanup
// CHECK: br label %[[Dealloc:.+]]
// CHECK: [[PromDtorPad]]:
// CHECK-NEXT: landingpad
// CHECK-NEXT: cleanup
// CHECK: call void @_ZN7CleanupD1Ev(%struct.Cleanup*
// CHECK: call void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_typeD1Ev(
// CHECK: br label %[[Dealloc]]
// CHECK: [[Dealloc]]:
// CHECK: %[[Mem:.+]] = call i8* @llvm.coro.free(
// CHECK: call void @_ZdlPv(i8* %[[Mem]])
co_return;
}
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